If colleges offered camera equipment anatomy classes, this Leica lens cutaway might be one of the things you’d be examining in the lab. It’s a Leica Tri-Elmar-M 28-35-50mm sliced cleanly down the middle, revealing all the glass and pieces inside that go into making the lens.

These were actually made by Leica students as a graduation project and boxed as a “cutaway model” of the lens. Here’s the same thing done with a Leica 50mm f/1.4 Summilux M ASPH lens:

"All photographs are accurate. None of them is the truth." - Richard Avedon - 1984

"I have not failed. I've just found 10,000 ways that won't work." - Thomas Alva Edison

"Any photographer who says he’s not a voyeur is either stupid or a liar." - Helmut Newton

"You don’t have to sort of enhance reality. There is nothing stranger than truth." - Annie Leibovitz

"When you find yourself beginning to feel a bond between yourself and the people you photograph, when you laugh and cry with their laughter and tears, you will know you are on the right track." - Weegee

"The camera is much more than a recording apparatus. It is a medium via which messages reach us from another world." - Orson Welles

"Some people's photography is an art. Not mine. Art is a dirty word in photography. All this fine art crap is killing it already." - Helmut Newton

"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more. " - Nikola Tesla

"I think all art is about control - the encounter between control and the uncontrollable." - Richard Avedon

"The first 10 000 shots are the worst." - Helmut Newton

“If I have any ‘message’ worth giving to a beginner it is that there are no short cuts in photography.” – Edward Weston

"Men often become what they believe themselves to be. If I believe I cannot do something, it makes me incapable of doing it. But when I believe I can, then I acquire the ability to do it even if I didn't have it in the beginning." - Mahatma Gandhi

"Ultimately success or failure in photographing people depends on the photographer's ability to understand his fellow man." - Edward Weston

"If you want reality take the bus." - David LaChapelle

"You don't take a photograph, you make it." - Ansel Adams

"When I have sex with someone I forget who I am. For a minute I even forget I’m human. It’s the same thing when I’m behind a camera. I forget I exist." - Robert Mapplethorpe

"Great photography is always on the edge of failure." - Garry Winogrand

"I don’t think photography has anything remotely to do with the brain. It has to do with eye appeal." - Horst P. Horst

"Be yourself. I much prefer seeing something, even it is clumsy, that doesn't look like somebody else's work." - William Klein

"Avedon claims to have been the best photographer in the '60s - bullshit - Bob Richardson was - despite or because of being insane and strung out on drugs, I managed to do photographs that are considered iconic - being known as the 'photographer's photographer' means I lead and they follow - I'm broke and they are rich." - Bob Richardson